[Enhancement]: Add possiblity to preview post before committing

[XanatosX]

Description

I recently did try to get the quality of a video right, but as the optimization step is done after entering all the data I cannot verify the outcome. So I need to create a proper post, look at the video and delete it if the quality is not up to my standard after the video got optimized.

I thin it would be nice to show that optimized video to the user once before you commit your post.

Use-case

This will prevent informing instances and users about a new upload getting deleted right away as the video is not up to standard from a quality standpoint after optimization.

Acknowledgements

Yes